That's the best way to get rid of a bunch (murder) of crows at once, sid. Wing one with a .22. He screams and all crows in earshot come to see what's up and if they can help - wait as long as you dare to attract many - then break out the scatter gun. I've got as many as 16 with one shot. This was years ago in the country, I wouldn't advise this in the burbs - unless you like the jail's stale sandwiches!
JRobyn, there's lots of hawks around and we even have 2 that patrol around my yard all the time, but have never seen them get a squirrel - mostly field mice and small snakes(just because I've not seen it doesn't mean they don't).
Western, I tried chunky peanut butter years ago. They loved it, couldn't get enough not one choked though. I believe they even told all the squirrels in the county. They used to swarm on it. I reckon it'd make a great bait to use to fill the freezer.
Was talking to a friend from WVA yesterday and he told me his uncle always put a radio, covered and weatherproofed of coarse, in his gardens left on 24/7. He never had any critter/varmint problem at all. This is an easy and cheap try.